Jack Ü fans heading to Hangout Music Festival this weekend are in for a treat. Due to vocal chord issues, Sam Smith was forced to cancel his headlining performance at the Alabama beach fest, forfeiting the slot to Skrillex and Diplo’s Jack Ü side project. With Skrillex already on the lineup this sudden swap will give fans of Sonny Moore a double dose of the OWSLA head honcho on Friday and Saturday.